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jclaude
Joined: 14 Sep 2011
Posts: 28
Location: Toulouse France
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 Posted: Wed Nov 16, 2011 7:47 am Post subject: Stuck aperture |
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jclaude wrote:
I'm currently trying to fix the stuck aperture of an Hanimex 135mm, lighter gaz seems to be of limited effect, does someone try to use WD40 for that, or any other liquid?
I fear to completely unassemble the blades!
Thanks
Jean Claude |
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Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
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| Posted: Wed Nov 16, 2011 8:42 am Post subject: Re: Stuck aperture |
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Excalibur wrote:
| jclaude wrote: |
I'm currently trying to fix the stuck aperture of an Hanimex 135mm, lighter gaz seems to be of limited effect, does someone try to use WD40 for that, or any other liquid?
I fear to completely unassemble the blades!
Thanks
Jean Claude |
Well I wouldn't go beyond lighter fuel for a quick fix, if that doesn't work then it's not always necessary to take the blades apart but just clean the the whole assembly in:- well some say hot soapy water others say lighter fuel.
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.........past gear Tele Rolleiflex and Rollei SL66.
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Last edited by Excalibur on Wed Nov 16, 2011 8:55 am; edited 1 time in total |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Wed Nov 16, 2011 8:46 am Post subject: |
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peterqd wrote:
Hello J-C
Never, EVER, use WD40!! It might have a good effect to begin with, but after a short time the blades will become totally stuck. This have been learned through bitter experience! 
The blades need to be completely clean and dry. Keep applying the lighter fuel and working the blades at the same time and use a cool hairdryer to dry them. It requires a lot of time and patience!
If you can see how to remove the complete aperture assembly without dismantling it, to work on the other side, that might have some success.
Sometmes the springs which activate the blades and the mechanism can become stretched and weak. Also the mechanism might need cleaning/lubrication. Either of these can affect the speed of the blade movement too.
Remember - patience is the word!
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ZoneV
Joined: 09 Nov 2009
Posts: 1632
Location: Germany
Expire: 2011-12-02
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| Posted: Wed Nov 16, 2011 10:02 am Post subject: |
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ZoneV wrote:
I use sometimes WD 40 - but only if screws are corroded that I can not open them. For the application I use cotton swapy - don´t even think about using the spray.
And after I open the screws I have to clean very much to get all WD 40 away.
To use WD 40 without planning to open all seems very difficult, it spreads around!
For stuck or slow iris blades I use isopropanol alcohol. Iris need no grease or oil!
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Camera modification, repair and DIY - some links to look through: http://www.4photos.de/camera-diy/index-en.html
I AM A LENS NERD!
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jclaude
Joined: 14 Sep 2011
Posts: 28
Location: Toulouse France
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| Posted: Wed Nov 16, 2011 9:00 pm Post subject: |
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jclaude wrote:
Thanks all for your replies, I will avoid WD40 and continue with lighter fuel, some more time!
Jean Claude |
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